Kangta is a different case. He's Korean ambassador in China for many events. He gets to delay his duty because of the work he does, not because of really working on his album. Some artists use school as an excuse to delay the service, while others may use their album as an excuse... They just have to send the paper work into the military and see if they aprove of the deferral.
I'm not sure if PHS is still continuing with his studies. If he is, then there's a high chance he can defer the date... That means, we get to see him more...
I loved the YDHLL perf of Snowflower... It was really like a concert, where he's signing, without music... It shows how talented he is... I agree that PHS should be made an OST singer cause he's got a nice voice and ppl would be more attracted to the drama because of the title song... Yuki no hana by Mika Nakashima really isn't that great... I don't feel her emotions... I prefer PHS's version... It's so emotional...
I didn't really mean making PHS an ost singer--that will be too wasteful and in the process will potentially limit the genre of music he's into..i am fine with what he's doing now..in fact, i highly suspect he will be doing less of ballads and more of other genres in future, looking at his image now..

Actually, i don't know if u all have noticed this but try listening to the instrumental version of "snowflower" in MISA ost and we will know Park's singing prowness..i mean, the instrumental version is actually very boring in nature, consisiting entirely of chords! This is very different from other MR/instrumental version of theme songs in other osts for which composers colour the pieces heavily so that with or without the singer's involvement, the pieces can be heard on their own..it's realising this that i began admiring PHS almost 3 years ago..many other singers have heavy accompaniment and stuff, maybe trying to mask or cover their intrinsic singing weakness..but this is not the case for "snowflower"..it really takes a skilled singer to fill up the song which has very simple chords in nature. Now, i think that's what a real gasoo should try to achieve. Maybe i am very fed up with all the so called "singers" i see nowadays..Park is truly a gem to be treasured and appreciated..